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Raj G, Raj M, Saigo L. Accuracy of conventional versus cone-beam CT-synthesised lateral cephalograms for cephalometric analysis: A systematic review. J Orthod 2024; 51:160-176. [PMID: 37340975 DOI: 10.1177/14653125231178038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
OBJECTIVE To assess the accuracy of cone-beam computed tomography (CBCT)-synthesised lateral cephalograms (CSLCs) compared with conventional lateral cephalograms for cephalometric analysis in human participants and skull models. METHODS The authors performed a search of PubMed, Scopus, Google Scholar and Embase databases on 4 October 2021. Included studies met the following criteria: published in English; compared conventional lateral cephalograms and CSLCs; assessed hard- and soft-tissue landmarks; and were performed on human or skull models. Data extraction from eligible studies was performed by two independent reviewers. The quality of evidence was assessed using the Joanna Briggs Institute (JBI) Critical Appraisal Checklist tool - diagnostic accuracy studies. RESULTS A total of 20 eligible articles were included in this systematic review. Of these 20 studies, 17 presented with a low risk of bias, while three were found to have a moderate risk of bias. Hard- and soft-tissue analyses were evaluated for each imaging modality. The findings reveal that CSLCs are accurate and comparable to conventional lateral cephalograms for cephalometric analysis and demonstrate good inter-observer reliability. Four studies reported a higher accuracy with CSLCs. CONCLUSION Overall, the diagnostic accuracy and reproducibility of CSLCs were comparable to conventional lateral cephalograms in cephalometric analysis. It is justified that patients who have an existing CBCT scan do not need an additional lateral cephalogram, minimising unnecessary radiation exposure, expenses and time for the patient. Larger voxel sizes and low-dose CBCT protocols can be considered to minimise radiation exposure. REGISTRATION This study was registered with PROSPERO (CRD42021282019).
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Affiliation(s)
- Grace Raj
- National Dental Centre Singapore, Singapore
| | - Mary Raj
- National Dental Centre Singapore, Singapore
| | - Leonardo Saigo
- Department of Oral & Maxillofacial Surgery, National Dental Centre Singapore, Singapore
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Alqutaibi AY, Alghauli MA, Aboalrejal A, Mulla AK, Almohammadi AA, Aljayyar AW, Alharbi SO, Almuzaini ES, Alsaeedi AK, Arabi LF, Alhajj MN, Halboub E. Quantitative and qualitative 3D analysis of mandibular lingual concavities: Implications for dental implant planning in the posterior mandible. Clin Exp Dent Res 2024; 10:e858. [PMID: 38345362 PMCID: PMC10860544 DOI: 10.1002/cre2.858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/23/2024] [Accepted: 01/26/2024] [Indexed: 02/15/2024] Open
Abstract
OBJECTIVE The purpose of this study is to investigate the type of ridge (degree of angulation of the lingual concavity) and the buccolingual dimensions in the area of the first and second molars in both genders of different ages and how this will affect implant placement in the posterior mandible. MATERIALS AND METHODS This retrospective cross-sectional study comprised cone beam computed tomography images of 150 dental patients (75 males and 71 aged ≥30). The following were measured/reported: type (morphology) of the ridge (convex [C], parallel [P], or undercut [U]), buccolingual width at the base and the crest of the ridge, and ridge height. The concavity angle, depth, and length of the U-shaped ridge were measured too. RESULTS The prevalence of type U ridge ranged from 32.7% in the first molar region to 62.7% in the second molar region. Almost all measurements and ridge type distributions were comparable amongst the age groups (p > .05). Very few significant differences were found when comparing #36 versus #37 and #46 versus #47 teeth, with no differences in the distribution of the ridge types (p > .05). Quite the inverse, all measurements were statistically different when comparing #36 versus #37 and #46 versus #47 teeth, and type U ridge was more frequent in second molar compared to the first molar regions, respectively (p < .05). Many measurements were statistically higher in females; the inverse was true for a few measurements (p < .05). Type U ridge in #36 and #37 was found more frequently among males (p < .001). In contrast, the ridge types in #37 and #47 were not statistically different gender-wise. CONCLUSIONS The U type of ridge was more prevalent in the investigated population, encountered more frequently in the second molars generally and in the first molars of males than females. Most posterior mandibular measurements are similar age- and side-wise but seem different gender- and tooth-wise.
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Affiliation(s)
- Ahmed Yaseen Alqutaibi
- Substitutive Dental Science Department, College of DentistryTaibah UniversityAl‐MadinahSaudi Arabia
- Department of Prosthodontics, Faculty of DentistryIbb UniversityIbbYemen
| | | | - Afaf Aboalrejal
- Oral Biology Department, College of DentistryIbb UniversityIbbYemen
| | | | | | | | | | | | | | - Lina F. Arabi
- College of DentistryTaibah UniversityAl MadinahSaudi Arabia
| | | | - Esam Halboub
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of DentistryJazan UniversityJazanSaudi Arabia
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Borzangy S, Alqutaibi AY, Krsoum M, Aljohani R, Qadri O. Evaluation of Implant Placement Risk Levels in Partially Edentulous Patients Using Cone Beam Computed Tomography. Cureus 2023; 15:e47893. [PMID: 38034143 PMCID: PMC10682683 DOI: 10.7759/cureus.47893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2023] [Indexed: 12/02/2023] Open
Abstract
OBJECTIVE This study aimed to evaluate the implant placement risk levels in partially edentulous patients using cone beam computed tomography (CBCT) and implant planning software. MATERIALS AND METHODS A total of 101 CBCT scans of partially edentulous patients were included. Evaluations of jawbone anatomy, vital structures' proximity, and the risk of inferior alveolar nerve injury with esthetic considerations were done on CBCT images using implant surgery software (Blue Sky Plan 4; Blue Sky Bio, Grayslake, IL). RESULTS A total of 101 patients with 106 edentulous sites were examined. The mean ridge height of the non-esthetic zone was 10 mm and 14.4 mm in the maxilla and mandible, respectively. The period of edentulousness significantly affected the risk of placing implants in the non-esthetic zone (P<.05). The relation between gender and mandibular canal identification was significant (P<.01). A higher risk of implant placement is associated with a more extended period of edentulousness. The preoperative assessment revealed that the mandibular canal could be identified more easily in females than males; thus, nerve injury could be avoided. However, age had no associated effect. CONCLUSION Age has no associated effect on the implant placement risk levels for partially edentulous patients during dental implant planning. A higher risk of implant placement is associated with a more extended period of edentulousness. Mandibular canal identification during virtual preoperative assessment was higher in females.
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Affiliation(s)
- Sary Borzangy
- Substitutive Dental Sciences, College of Dentistry, Taibah University, Madinah, SAU
| | | | - Majid Krsoum
- Dentistry, King Abdulaziz Medical City, Ministry of National Guard - Health Affairs, Jeddah, SAU
| | - Rana Aljohani
- Substitutive Dental Sciences, College of Dentistry, Taibah University, Madinah, SAU
| | - Osama Qadri
- Dentistry, Magrabi Dental Center, Madinah, SAU
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Al-Wesabi SN, Abotaleb B, Al-Shujaa EA, Mohamed AA, Alkebsi K, Telha W, Jian S, Fuqiang X. Three dimensional condylar positional and morphological changes following mandibular reconstruction based on CBCT analysis: a prospective study. Head Face Med 2023; 19:3. [PMID: 36747208 PMCID: PMC9903492 DOI: 10.1186/s13005-023-00347-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 01/06/2023] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVE This study aimed to evaluate the condylar positional changes following mandibular reconstruction with preservation of the condylar head using Cone-Beam Computed Tomography (CBCT). Also, to assess joint space changes and the overall volumetric space compared to the preoperative status. METHODOLOGY This prospective study included 30 patients (60 joints) subjected to unilateral mandibular resection and reconstruction with preservation of the condylar head. The Helkimo index and preoperative (T1), two weeks postoperative (T2), and follow-up CBCTs (T3) after at least six months were gathered and processed to evaluate the condylar position and TMJ joint space using Anatomage Invivo 6. A student's t-test and repeated-measures ANOVA statistics were used. A P value of less than 0.05 was considered statistically significant. RESULTS Thirty patients (14 males, 16 females) with a mean age of 40.01 ± 12.7 years (a range of 18.1-62.9 years) were included. On the tumor side, there were significant variances in the vertical and mediolateral condylar positions between the three-time points (T1, T2, T3). Immediately after the operation, the condyles were significantly displaced in a downward direction at T2, which became larger after the last follow-up period (T3) (p = 0.007). The condylar positions at the anteroposterior direction were relatively stable without significant differences between the three times points (p = 0.915). On the non-tumor side, the condylar positions were relatively stable in the mediolateral and anteroposterior positions. In the tumor side, all of the TMJ spaces were significantly increased in size following the mandibular reconstructions (T2 and T3). However, on the non-tumor side, the anterior, posterior, and medial joint spaces were significantly changed postoperatively. CONCLUSION After mandibular reconstruction with condylar preservation, the condylar position and volumetric measurement immediately changed noticeably and continued to be a permanent change over time compared to relatively stable condyles on the non-tumor side. According to Helkimo index, patients become adapted to the postoperative changes without significant differences between the two sides.
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Affiliation(s)
- Saddam Noman Al-Wesabi
- Lanzhou University, Second Hospital, Oral and Maxillofacial Surgery Department, Lanzhou, Gansu Province, China. .,State Key Laboratory of Oral Diseases and National Clinical Research Centre for Oral Diseases, Department of Oral implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China. .,Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen.
| | - Bassam Abotaleb
- grid.444909.4Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen
| | - Eissa Abdo Al-Shujaa
- grid.32566.340000 0000 8571 0482Lanzhou University, Second Hospital, Oral and Maxillofacial Surgery Department, Lanzhou, Gansu Province China ,grid.444909.4Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen
| | - Abdo Ahmed Mohamed
- grid.412536.70000 0004 1791 7851Department of Oral & Maxillofacial Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Khaled Alkebsi
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases and National Clinical Research Centre for Oral Diseases, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan China
| | - Wael Telha
- grid.13291.380000 0001 0807 1581State Key Laboratory of Oral Diseases and National Clinical Research Centre for Oral Diseases, Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan China
| | - Sun Jian
- grid.32566.340000 0000 8571 0482Lanzhou University, Second Hospital, Oral and Maxillofacial Surgery Department, Lanzhou, Gansu Province China
| | - Xie Fuqiang
- Lanzhou University, Second Hospital, Oral and Maxillofacial Surgery Department, Lanzhou, Gansu Province, China.
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Widmann G, Schönthaler H, Tartarotti A, Degenhart G, Hörmann R, Feuchtner G, Jacobs R, Pauwels R. As low as diagnostically acceptable dose imaging in maxillofacial trauma: a reference quality approach. Dentomaxillofac Radiol 2023; 52:20220387. [PMID: 36688730 PMCID: PMC9944010 DOI: 10.1259/dmfr.20220387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVES As-low-as-diagnostically-acceptable (ALADA) doses are substantially lower than current diagnostic reference levels. To improve dose management, a reference quality approach was tested in which phantom quality metrics of a clinical ALADA dose reference protocol were used to benchmark potential ALADA dose protocols for various scanner models. METHODS Spatial resolution, contrast resolution, contrast-to-noise ratio (CNR) and subjective noise and sharpness were evaluated for a clinical ALADA dose reference protocol at 80 kV and 40 mA (CTDIvol 2.66 mGy) and compared with test protocols of two CT scanners at 100 kV and 35 mA (3.08-3.44 mGy), 80 kV and 54-61 mA (2.65 mGy), 80 kV and 40 mA (1.73-1.92 mGy), and 80 kV and 21-23 mA (1.00-1.03 mGy) using different kernels, filtered backprojection and iterative reconstructions. The test protocols with the lowest dose showing quality metrics non-inferior to the reference protocol were verified in a cadaver study by determining the diagnostic accuracy of detection of maxillofacial fractures and CNR of the optical nerve and rectus inferior muscle. RESULTS 36 different image series were analysed in the phantom study. Based on the phantom quality metrics, potential ALADA dose protocols at 1.73-1.92 mGy were selected. Compared with the reference images, the selected protocols showed non-inferiority in the detection and classification of maxillofacial fractures and non-inferior CNR of orbital soft tissues in the cadaver study. CONCLUSIONS Reference quality metrics from clinical ALADA dose protocols may be used to guide selection of potential ALADA dose protocols of different CT scanners.
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Affiliation(s)
- Gerlig Widmann
- Department of Radiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Hannes Schönthaler
- Department of Radiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Alexander Tartarotti
- Department of Imaging and Pathology, OMFS-IMPATH Research Group, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Gerald Degenhart
- Department of Radiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Romed Hörmann
- Division of Clinical and Functional Anatomy, Medical University of Innsbruck, Innsbruck, Austria
| | - Gudrun Feuchtner
- Department of Radiology, Medical University of Innsbruck, Innsbruck, Austria
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Artificial intelligence models for clinical usage in dentistry with a focus on dentomaxillofacial CBCT: a systematic review. Oral Radiol 2023; 39:18-40. [PMID: 36269515 DOI: 10.1007/s11282-022-00660-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 09/29/2022] [Indexed: 01/05/2023]
Abstract
This study aimed at performing a systematic review of the literature on the application of artificial intelligence (AI) in dental and maxillofacial cone beam computed tomography (CBCT) and providing comprehensive descriptions of current technical innovations to assist future researchers and dental professionals. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols (PRISMA) Statement was followed. The study's protocol was prospectively registered. Following databases were searched, based on MeSH and Emtree terms: PubMed/MEDLINE, Embase and Web of Science. The search strategy enrolled 1473 articles. 59 publications were included, which assessed the use of AI on CBCT images in dentistry. According to the PROBAST guidelines for study design, seven papers reported only external validation and 11 reported both model building and validation on an external dataset. 40 studies focused exclusively on model development. The AI models employed mainly used deep learning models (42 studies), while other 17 papers used conventional approaches, such as statistical-shape and active shape models, and traditional machine learning methods, such as thresholding-based methods, support vector machines, k-nearest neighbors, decision trees, and random forests. Supervised or semi-supervised learning was utilized in the majority (96.62%) of studies, and unsupervised learning was used in two (3.38%). 52 publications included studies had a high risk of bias (ROB), two papers had a low ROB, and four papers had an unclear rating. Applications based on AI have the potential to improve oral healthcare quality, promote personalized, predictive, preventative, and participatory dentistry, and expedite dental procedures.
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Mohamed AAS, Rao G, Mai L, Sakran KA, Al-wesabi SN, Pan C, Lin Z. Is the retromandibular approach a suitable approach to anatomical reduction of unilateral subcondylar fracture? A non-randomized clinical trial. Head Face Med 2022; 18:38. [PMID: 36461049 PMCID: PMC9716850 DOI: 10.1186/s13005-022-00342-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 10/20/2022] [Indexed: 12/03/2022] Open
Abstract
The aim of this study was to evaluate the efficacy of the retromandibular approach (RMA) to produce three-dimensional (3-D) reduction of the unilateral subcondylar fracture and Temporomandibular Joint (TMJ) functional implication. METHODS A prospective cohort study was designed. Twenty-nine patients with unilateral subcondylar fracture underwent consecutively Open Reduction, and Internal Fixation. The cohorts were divided into two groups; RMA group (n = 16, 55.17%) and submandibular approach SMA group (n = 13, 44.82%). The primary outcome was the anatomical 3-D reduction of the condyle. The secondary outcome was to compare the condyle position and inclination finding with TMJ outcomes. Helkimo Index score was used to evaluate the TMJ outcome at six months postoperatively. RESULT There was a significant difference between the mediolateral condylar inclination, condylar medial and vertical positions when RMA compared with SMA groups (P < 0.05). The medial joint space was correlated with the medial condylar position in both groups (P < 0.05). The Helkimo Ai and Di was associated with mediolateral condylar inclination in SMG; however, Helkimo Ai was found to be correlated with the RMA group. CONCLUSION The current study demonstrates that the RMA could re-establish the anatomical position of the unilateral subcondylar fracture in patients undergoing ORIF. The clinical outcome of the TMJ with RMA was better than SMA.
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Affiliation(s)
- Abdo Ahmed Saleh Mohamed
- Department of Oral & Maxillofacial Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen
- Department Oral and Maxillofacial Surgery, Lanzhou University First Affiliated Hospital, Lanzhou University, Lanzhou, Gansu Province, China
| | - Guangxin Rao
- Department of Oral & Maxillofacial Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Lianxi Mai
- Department of Oral & Maxillofacial Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Karim Ahmed Sakran
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen
- Resident, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Saddam Noman Al-wesabi
- Department of Oral and Maxillofacial surgery, School of stomatology, Lanzhou University, Lanzhou, Gansu, China
| | - Chaobin Pan
- Department of Oral & Maxillofacial Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Zhaoyu Lin
- Department of Oral & Maxillofacial Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
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Sharma A, Pai V, Hegde M, Rajaram S. Three-dimensional evaluation of condylar position in skeletal Class I and Class II malocclusions along with vertical facial morphology. APOS TRENDS IN ORTHODONTICS 2022. [DOI: 10.25259/apos_124_2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Objectives:
This study aimed to three-dimensionally evaluate and compare anatomic condylar position to glenoid fossa in skeletal Classes I and II malocclusions along with vertical facial morphology (VFM).
Material and Methods:
Full skull 50 cone-beam computed tomographies (CBCTs) were taken with teeth in maximum intercuspation of patients aged 18–45 years who were grouped as skeletal Classes I and II, 25 each based on ANB angle and the patient’s right condyle was analyzed on CareStream-3D viewing software. The VFM was categorized based on the Jarabak ratio. Statistical analysis was performed using Mann–Whitney and Chi-square test.
Results:
In skeletal Class II when compared to Class I, the condyle in the glenoid fossa was anteriorly positioned with reduced anterior (P = 0.006) and increased posterior (P = 0.04) distance showing eccentric position. The condyle was also positioned lower suggesting an increased distance in the upper joint space (P = 0.04). The reduced height of the articular eminence indicated the condylar path and its position. The angle of articular eminence (P = 0.44) was decreased. Statistically, significant difference was not found between the various vertical facial morphologies.
Conclusion:
CBCT provides precise diagnostic values of joint spaces in skeletal Classes I and II to differentiate ideal condylar position from non-ideal according to different skeletal patterns, VFM, and also to notice minor discrepancies in joint spaces quantitatively. Depending on increased or decreased distances in the joint spaces, one can identify any temporomandibular joint-related discrepancies.
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Affiliation(s)
- Aditi Sharma
- Department of Orthodontics and Dentofacial Orthopaedics, Bangalore Institute of Dental Sciences, Bengaluru, Karnataka, India,
| | - Vinaya Pai
- Department of Orthodontics and Dentofacial Orthopaedics, Bangalore Institute of Dental Sciences, Bengaluru, Karnataka, India,
| | - Manjunath Hegde
- Department of Orthodontics and Dentofacial Orthopaedics, Bangalore Institute of Dental Sciences, Bengaluru, Karnataka, India,
| | - Shreyas Rajaram
- Department of Orthodontics and Dentofacial Orthopaedics, Bangalore Institute of Dental Sciences, Bengaluru, Karnataka, India,
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Al-Sarem M, Al-Asali M, Alqutaibi AY, Saeed F. Enhanced Tooth Region Detection Using Pretrained Deep Learning Models. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15414. [PMID: 36430133 PMCID: PMC9692549 DOI: 10.3390/ijerph192215414] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 06/15/2023]
Abstract
The rapid development of artificial intelligence (AI) has led to the emergence of many new technologies in the healthcare industry. In dentistry, the patient's panoramic radiographic or cone beam computed tomography (CBCT) images are used for implant placement planning to find the correct implant position and eliminate surgical risks. This study aims to develop a deep learning-based model that detects missing teeth's position on a dataset segmented from CBCT images. Five hundred CBCT images were included in this study. After preprocessing, the datasets were randomized and divided into 70% training, 20% validation, and 10% test data. A total of six pretrained convolutional neural network (CNN) models were used in this study, which includes AlexNet, VGG16, VGG19, ResNet50, DenseNet169, and MobileNetV3. In addition, the proposed models were tested with/without applying the segmentation technique. Regarding the normal teeth class, the performance of the proposed pretrained DL models in terms of precision was above 0.90. Moreover, the experimental results showed the superiority of DenseNet169 with a precision of 0.98. In addition, other models such as MobileNetV3, VGG19, ResNet50, VGG16, and AlexNet obtained a precision of 0.95, 0.94, 0.94, 0.93, and 0.92, respectively. The DenseNet169 model performed well at the different stages of CBCT-based detection and classification with a segmentation accuracy of 93.3% and classification of missing tooth regions with an accuracy of 89%. As a result, the use of this model may represent a promising time-saving tool serving dental implantologists with a significant step toward automated dental implant planning.
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Affiliation(s)
- Mohammed Al-Sarem
- College of Computer Science and Engineering, Taibah University, Medina 42353, Saudi Arabia
- Department of Computer Science, Sheba Region University, Marib 14400, Yemen
| | - Mohammed Al-Asali
- College of Computer Science and Engineering, Taibah University, Medina 42353, Saudi Arabia
| | - Ahmed Yaseen Alqutaibi
- Department of Prosthodontics and Implant Dentistry, College of Dentistry, Taibah University, Al Madinah 41311, Saudi Arabia
- Department of Prosthodontics, College of Dentistry, Ibb University, Ibb 70270, Yemen
| | - Faisal Saeed
- College of Computer Science and Engineering, Taibah University, Medina 42353, Saudi Arabia
- DAAI Research Group, Department of Computing and Data Science, School of Computing and Digital Technology, Birmingham City University, Birmingham B4 7XG, UK
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Al Ahmari NM. Osseo-densification versus conventional surgical technique in low density jaw bone: A split mouth in vivo study. Technol Health Care 2022; 30:1117-1124. [DOI: 10.3233/thc-220048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: The success of dental implants depend on implant design, surgical technique, bone density, implant morphology and postoperative care. Initial stability is utmost importance and is of concern in low density bone. The osseo-densification strategy enhance primary stability by raising density of the osteotomy site walls by non-subtractive drilling, unlike conventional technique. OBJECTIVE: The aim of this in vivo study was to assess and compare the osseo-densification implant drilling technique with conventional implant drilling in terms of primary implant stability along with other factors, plaque index, bleeding on probe, pocket depth and radiographic assessment of bone density, marginal bone loss using CBCT. METHOD: A total of 20 patients aged between 40 and 59 years were included in this research. A split-mouth configuration of 40 implants was used. In the osseo-densification group, specialized (Densah) bur kit was used to insert 20 implants on one side. In the conventional group, standard bur kit was used to insert 20 implants on the opposite side of the jaw. For each patient, clinical and radiographic assessment was performed at regular intervals at the beginning (immediately after surgery), seven months, and a year following surgery. RESULTS: With the exception of bone density, which was statistically significant in favour of the osseo-densification group immediately after surgery, primary and secondary stability, plaque index, bleeding on probe, pocket depth and even marginal bone loss were not significantly different between the two groups in this investigation. CONCLUSION: Osseo-densification technique provided a better primary stability in the low density bone cases thus, can be consider as a trustworthy treatment for speeding up the healing process while also maintaining marginal bone integrity following loading. Use of specialized bur while drilling procedure improves the density around the implants.
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Al Sadhan R, Zain-Alabdeen E. Anterior buccal mandibular depression: A descriptive study of CT findings. J Taibah Univ Med Sci 2022; 17:283-288. [PMID: 35592802 PMCID: PMC9073888 DOI: 10.1016/j.jtumed.2021.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/09/2021] [Accepted: 08/13/2021] [Indexed: 11/26/2022] Open
Abstract
Objective This study aims to report the concurrence of the radiographic features of anterior buccal mandibular depressions (ABMDs) and anterior lingual mandibular depressions (ALMDs) by conventional computed tomography (CT) and cone beam CT scans. We also assess the effect of ABMDs and ALMDs on dental implant sites. Methods A retrospective review of CT scans of the mandibles with ABMDs was conducted to assess the morphology, site, presence of foramina, ALMDs, and the integrity of the cortical plate. The superoinferior width of ABMD, the buccolingual depth, and mesiodistal length were measured and compared with the thickness of the cortical plate at the depression to the area superior to it. Results Thirty-seven patients with 74 ABMDs were included in this study. All observed ABMDs occurred bilaterally, and ALMDs with ABMDs occurred in 13 sites (17.56%). In 20 (54%) cases, at least one foramen was noted. The buccal cortical bone was intact in all cases. The contents of ABMDs were found to be fatty. On an average, their superoinferior width was 7.1 mm, buccolingual depth 1.67 mm, and mesiodistal length 18.8 mm. The average buccal cortical bone plate thickness at the ABMD was 1.23 mm (range 0.4-1.9 mm), while the average buccal cortical bone plate thickness coronal to the ABMD was 1.34 mm (range 0.7-2.2 mm). The average buccolingual dimension of the mandible was 8.72 mm (range 4.15-13.4 mm) at ABMD sites without ALMD and 4.6 mm with ALMD (range 1.8-8 mm). Conclusion When ALMD occurs in the presence of ABMD, the amount of bone available for implant placement is greatly reduced.
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Affiliation(s)
- Ra'ed Al Sadhan
- Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, Riyadh, KSA
| | - Ebtihal Zain-Alabdeen
- Department of Oral Clinical and Basic Sciences, College of Dentistry, Taibah University, Almadinah Almunawwarah, KSA
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Ren J, You M, Wang H, Tang B, Liu Y. A comparative evaluation of cone beam computed tomography and multi-slice computed tomography on the volume of tooth in-vitro. 2021 IEEE INTERNATIONAL CONFERENCE ON MEDICAL IMAGING PHYSICS AND ENGINEERING (ICMIPE) 2021. [DOI: 10.1109/icmipe53131.2021.9698963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jiayin Ren
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Meng You
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Hu Wang
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Bei Tang
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Yuanyuan Liu
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
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Al-Ekrish AA. Comparative study of the accuracy of CBCT implant site measurements using different software programs. Saudi Dent J 2021; 33:355-361. [PMID: 34434039 PMCID: PMC8376669 DOI: 10.1016/j.sdentj.2020.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 06/01/2020] [Accepted: 07/06/2020] [Indexed: 01/03/2023] Open
Abstract
Purpose To measure and compare the accuracy of the linear dimensions of implant sites recorded from cone beam computed tomography (CBCT) images using Blue Sky Plan, coDiagnostiX, and RadiAnt. Materials and Methods Five human dry skulls were imaged with a CBCT device then sectioned to obtain sample transverse cross-sections of the edentulous ridges, and the height and width of the ridge were measured with a digital caliper to provide the gold standard measurements. The CBCT datasets were exported in DICOM format and imported into the three test software programs which were used to obtain reformatted sectional images corresponding to the sample transverse cross-sections, and the height and width of the edentulous ridge was recorded using the linear measurement tool. Reliability of the measurements were measured using the intraclass correlation coefficient. One-sample t-test (test value: zero) was used to test the statistical significance of the mean of the absolute errors for each software program. Analysis of Variance with Repeated Measures was used to test the statistical significance of the difference between the means of the absolute errors obtained by the different software programs. Statistical significance was set at a p-value of 0.05. Results The reliability of the gold standard and image measurements were excellent. All three software programs demonstrated a statistically significant mean absolute measurement error of between 0.43 and 0.56 mm (p-value < 0.01), but no significant difference in error values was found between any of the tested programs (p- value = 0.18). Conclusions There was no statistically significant difference in accuracy of linear CBCT measurements of implant sites recorded using Blue Sky Plan, coDiagnostiX, and RadiAnt.
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Affiliation(s)
- Asma'a A Al-Ekrish
- King Saud University, College of Dentistry, Department of Oral Medicine and Diagnostic Sciences, Division of Oral and Maxillofacial Radiology, P.O. Box 60169, Riyadh 11545, Saudi Arabia
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Kaasalainen T, Ekholm M, Siiskonen T, Kortesniemi M. Dental cone beam CT: An updated review. Phys Med 2021; 88:193-217. [PMID: 34284332 DOI: 10.1016/j.ejmp.2021.07.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 06/16/2021] [Accepted: 07/09/2021] [Indexed: 12/12/2022] Open
Abstract
Cone beam computed tomography (CBCT) is a diverse 3D x-ray imaging technique that has gained significant popularity in dental radiology in the last two decades. CBCT overcomes the limitations of traditional two-dimensional dental imaging and enables accurate depiction of multiplanar details of maxillofacial bony structures and surrounding soft tissues. In this review article, we provide an updated status on dental CBCT imaging and summarise the technical features of currently used CBCT scanner models, extending to recent developments in scanner technology, clinical aspects, and regulatory perspectives on dose optimisation, dosimetry, and diagnostic reference levels. We also consider the outlook of potential techniques along with issues that should be resolved in providing clinically more effective CBCT examinations that are optimised for the benefit of the patient.
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Affiliation(s)
- Touko Kaasalainen
- HUS Diagnostic Center, Radiology, Helsinki University and Helsinki University Hospital, P.O. Box 340, Haartmaninkatu 4, 00290 Helsinki, Finland.
| | - Marja Ekholm
- Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, 20520 Turku, Finland; South West Finland Imaging Center, Turku University Hospital, Lemminkäisenkatu 2, 20520 Turku, Finland
| | - Teemu Siiskonen
- Radiation Practices Regulation, Radiation and Nuclear Safety Authority - STUK, P.O. Box 14, FI-00881 Helsinki, Finland
| | - Mika Kortesniemi
- HUS Diagnostic Center, Radiology, Helsinki University and Helsinki University Hospital, P.O. Box 340, Haartmaninkatu 4, 00290 Helsinki, Finland
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Mohamed AAS, Abotaleb B, Ahmed Abdulqader A, Hongliang D, Sakran KA, He D. Three-dimensional assessment of accuracy for open reduction and internal fixation of the subcondylar fracture and its implications on the TMJ function. J Craniomaxillofac Surg 2021; 49:1035-1043. [PMID: 34217568 DOI: 10.1016/j.jcms.2021.06.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 05/24/2021] [Accepted: 06/15/2021] [Indexed: 02/08/2023] Open
Abstract
This study used three-dimensional cone beam computed tomography (CBCT) to assist the accuracy of open reduction and internal fixation (ORIF) for the unilateral subcondylar fracture and the long-term temporomandibular joint (TMJ) function impairment. Bilateral TMJs were analyzed postoperatively on CBCT images, involving the following three-dimensional (3D) parameters: condylar position and inclination; circumferential joint space, ramus, and mandible length; and the volumetric joint space. The inclusion criteria for adult patients included having a displaced fracture >5°, a shortening in ramus length >2 mm, and mouth opening limitation. The non-fracture side was used as the comparison group. The Helkimo index was employed for the clinical assessment of the outcomes, while the paired student t-test and Pearson coefficient test were used to compare both sides. The study included 60 joints in 30 consecutive patients. The condylar inclination to the horizontal plane on the fracture and non-fracture sides was 9.29 ± 3.9°, 12.46 ± 4.2°, (p < 0.001) and was positively related to the subjective (Helkimo Hi) and objective (Helkimo Di) clinical outcomes. In contrast, the condylar position to the midsagittal plane in the fracture and non-fracture sides was 51.95 ± 3.5 mm, 50.17 ± 3.6 mm (P = 0.038), and was positively related to the objective outcomes. Additionally, the objective outcome was negatively related to the change of the posterior joint space. CONCLUSION: The three-dimensional assessments seem to demonstrate that the ORIF is an accurate approach for obtaining a three-dimensional reduction to the displaced subcondylar fracture.
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Affiliation(s)
- Abdo Ahmed Saleh Mohamed
- Department of Oral and Maxillofacial Surgery, Lanzhou University First Affiliated Hospital, Lanzhou University, Lanzhou, Gansu Province, China; Department of Oral and Maxillofacial Surgery, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, 56th Lingyuanxi Road, Guangzhou, Guangdong, 510055, China; Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen.
| | - Bassam Abotaleb
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China; Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen
| | - Abbas Ahmed Abdulqader
- Department of Orthodontic, West China School of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Du Hongliang
- Department of Oral and Maxillofacial Surgery, Lanzhou University First Affiliated Hospital, Lanzhou University, Lanzhou, Gansu Province, China
| | - Karim Ahmed Sakran
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China; Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ibb University, Ibb, Yemen
| | - Dengqi He
- Department of Oral and Maxillofacial Surgery, Lanzhou University First Affiliated Hospital, Lanzhou University, Lanzhou, Gansu Province, China.
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Ahmed J, Sujir N, Shenoy N, Binnal A, Ongole R. Morphological Assessment of TMJ Spaces, Mandibular Condyle, and Glenoid Fossa Using Cone Beam Computed Tomography (CBCT): A Retrospective Analysis. Indian J Radiol Imaging 2021; 31:78-85. [PMID: 34316114 PMCID: PMC8299507 DOI: 10.1055/s-0041-1729488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Background
The temporomandibular joint (TMJ) is included in the category of ginglymoarthrodial synovial joints. The mandibular condyle plays a vital part in the development of the craniofacial complex. Hence, the evaluation and assessment of the condylar volume and its morphology are of utmost importance.
Aim
The aim of this research was to use cone beam computed tomography (CBCT) imaging modality to evaluate the morphology of the mandibular condyle and glenoid fossa in a selected population and document any morphometric changes.
Setting and Design
It is an observational study.
Materials and Methods
A retrospective CBCT analysis was performed on 119 patients. The length, width, height, linear measurements of the joint spaces (anterior, posterior, and superior), volume of the condyle, and roof of glenoid fossa thickness were evaluated on both the left and right sides in both males and females.
Results
The height, width, and length of mandibular condyle were significantly increased in males on both sides. Except for the left anterior space, all other spaces were significantly larger in males. Overall, the volume of the condyles in males was significantly increased on both sides.
Conclusion
CBCT can be a valuable diagnostic aid in the evaluation of various dimensions, joint spaces, and condylar volume in different planes and thus, can be a useful predictor in the assessment of treatment outcomes of disorders affecting the TMJ.
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Affiliation(s)
| | - Junaid Ahmed
- Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Nanditha Sujir
- Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Nandita Shenoy
- Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Almas Binnal
- Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Ravikiran Ongole
- Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
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17
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Jha N, Kim YJ, Lee Y, Lee JY, Lee WJ, Sung SJ. Projected lifetime cancer risk from cone-beam computed tomography for orthodontic treatment. Korean J Orthod 2021; 51:189-198. [PMID: 33984226 PMCID: PMC8133899 DOI: 10.4041/kjod.2021.51.3.189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/20/2020] [Accepted: 12/09/2020] [Indexed: 11/10/2022] Open
Abstract
Objective To estimate the projected cancer risk attributable to diagnostic cone-beam computed tomography (CBCT) performed under different exposure settings for orthodontic purposes in children and adults. Methods We collected a list of CBCT machines and their specifications from 38 orthodontists. Organ doses were estimated using median and maximum exposure settings of 105 kVp/156.8 mAs and 130 kVp/200 mAs, respectively. The projected cancer risk attributable to CBCT procedures performed 1-3 times within 2 years was calculated for children (aged 5 and 10 years) and adult (aged 20, 30, and 40 years) male and female patients. Results For maximum exposure settings, the mean lifetime fractional ratio (LFR) was 14.28% for children and 0.91% for adults; this indicated that the risk to children was 16 times the risk to adults. For median exposure settings, the mean LFR was 5.25% and 0.58% for children and adults, respectively. The risk of cancer decreased with increasing age. For both median and maximum exposure settings, females showed a higher risk of cancer than did males in all age groups. Cancer risk increased with an increase in the frequency of CBCT procedures within a given period. Conclusions The projected dental CBCT-associated cancer risk spans over a wide range depending on the machine parameters and image acquisition settings. Children and female patients are at a higher risk of developing cancer associated with diagnostic CBCT. Therefore, the use of diagnostic CBCT should be justified, and protective measures should be taken to minimize the harmful biological effects of radiation.
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Affiliation(s)
- Nayansi Jha
- Department of Dentistry, University of Ulsan College of Medicine, Seoul, Korea
| | - Yoon-Ji Kim
- Department of Orthodontics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | | | | | - Won Jin Lee
- Department of Preventive Medicine, Korea University College of Medicine, Seoul, Korea
| | - Sang-Jin Sung
- Department of Orthodontics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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18
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Kurt Bayrakdar S, Orhan K, Bayrakdar IS, Bilgir E, Ezhov M, Gusarev M, Shumilov E. A deep learning approach for dental implant planning in cone-beam computed tomography images. BMC Med Imaging 2021; 21:86. [PMID: 34011314 PMCID: PMC8132372 DOI: 10.1186/s12880-021-00618-z] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 05/05/2021] [Indexed: 12/20/2022] Open
Abstract
Background The aim of this study was to evaluate the success of the artificial intelligence (AI) system in implant planning using three-dimensional cone-beam computed tomography (CBCT) images. Methods Seventy-five CBCT images were included in this study. In these images, bone height and thickness in 508 regions where implants were required were measured by a human observer with manual assessment method using InvivoDental 6.0 (Anatomage Inc. San Jose, CA, USA). Also, canals/sinuses/fossae associated with alveolar bones and missing tooth regions were detected. Following, all evaluations were repeated using the deep convolutional neural network (Diagnocat, Inc., San Francisco, USA) The jaws were separated as mandible/maxilla and each jaw was grouped as anterior/premolar/molar teeth region. The data obtained from manual assessment and AI methods were compared using Bland–Altman analysis and Wilcoxon signed rank test. Results In the bone height measurements, there were no statistically significant differences between AI and manual measurements in the premolar region of mandible and the premolar and molar regions of the maxilla (p > 0.05). In the bone thickness measurements, there were statistically significant differences between AI and manual measurements in all regions of maxilla and mandible (p < 0.001). Also, the percentage of right detection was 72.2% for canals, 66.4% for sinuses/fossae and 95.3% for missing tooth regions. Conclusions Development of AI systems and their using in future for implant planning will both facilitate the work of physicians and will be a support mechanism in implantology practice to physicians.
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Affiliation(s)
- Sevda Kurt Bayrakdar
- Department of Periodontology, Faculty of Dentistry, Eskisehir Osmangazi University, Eskişehir, Turkey
| | - Kaan Orhan
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Ankara University, 06500, Ankara, Turkey. .,Medical Design Application and Research Center (MEDITAM), Ankara University, Ankara, Turkey.
| | - Ibrahim Sevki Bayrakdar
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Eskisehir Osmangazi University, Eskişehir, Turkey.,Eskisehir Osmangazi University Center of Research and Application for Computer Aided Diagnosis and Treatment in Health, Eskisehir, Turkey
| | - Elif Bilgir
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Eskisehir Osmangazi University, Eskişehir, Turkey
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Costa ALF, de Souza Carreira B, Fardim KAC, Nussi AD, da Silva Lima VC, Miguel MMV, Jardini MAN, Santamaria MP, de Castro Lopes SLP. Texture analysis of cone beam computed tomography images reveals dental implant stability. Int J Oral Maxillofac Surg 2021; 50:1609-1616. [PMID: 33962826 DOI: 10.1016/j.ijom.2021.04.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 02/10/2021] [Accepted: 04/19/2021] [Indexed: 11/28/2022]
Abstract
The aim of this study was to characterize the alveolar bone of edentulous maxillary sites using texture analysis (TA) of cone beam computed tomography (CBCT) images and to correlate the results to the insertion torque, thus verifying whether TA is a predictive tool of final implant treatment. This study was conducted on patients who had received single implants in the maxilla (46 implants) 1year earlier and whose torque values were properly recorded. Three cross-sections of the sites were selected on CBCT scans. Two regions of interest (ROIs) corresponding to the implant bone site and peri-implant bone were also outlined, according to virtual planning. The CBCT scans were exported to MaZda software, where the two ROIs were delimited following the previously demarcated contours. Values for the co-occurrence matrix were calculated for TA. With regard to the insertion torque value, there was a direct correlation with the contrast of the peri-implant bone (P<0.001) and an inverse correlation with the entropy of the implant bone site (P=0.006). A greater contrast indicates a greater torque value for insertion of the implants, and there is a possible association with a lower entropy value of the implant-bone interface.
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Affiliation(s)
- A L F Costa
- Postgraduate Program in Dentistry, Cruzeiro do Sul University (UNICSUL), São Paulo, Brazil.
| | - B de Souza Carreira
- Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - K A C Fardim
- Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - A D Nussi
- Postgraduate Program in Dentistry, Cruzeiro do Sul University (UNICSUL), São Paulo, Brazil
| | - V C da Silva Lima
- Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - M M V Miguel
- Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - M A N Jardini
- Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - M P Santamaria
- Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - S L P de Castro Lopes
- Department of Diagnosis and Surgery, São José dos Campos School of Dentistry, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
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20
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Tan WY, Ng JZL, Ajit Bapat R, Vijaykumar Chaubal T, Kishor Kanneppedy S. Evaluation of anatomic variations of mandibular lingual concavities from cone beam computed tomography scans in a Malaysian population. J Prosthet Dent 2021; 125:766.e1-766.e8. [PMID: 33752904 DOI: 10.1016/j.prosdent.2021.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/16/2021] [Accepted: 02/16/2021] [Indexed: 10/21/2022]
Abstract
STATEMENT OF PROBLEM Lingual plate perforation can be life-threatening when vital structures are damaged during implant placement. Knowledge of the anatomy of lingual concavities is imperative for safe implant surgery. PURPOSE The purpose of this clinical study was to determine the prevalence of type of posterior mandibular ridge morphology in a Malaysian population and to evaluate the buccolingual width of the alveolar ridge (Wb and Wc); alveolar ridge height (Vcb); and concavity angle, length, and depth for both left and right first and second molars in different age groups and sexes by using cone beam computed tomography (CBCT). MATERIAL AND METHODS Bilateral posterior mandibular lingual concavities at the first and second molars were retrospectively studied in cross-sectional views of 150 CBCT scans (n=600 sites evaluated). The sample size was calculated at a power of 80%, confidence interval of 95%, and margin of error of .05. The buccolingual width from the base and crest of the ridge and the ridge height were measured to determine the type of ridge. For the U-shaped ridge, the concavity angle, length, and depth were assessed. The independent t test was used to compare mean values of CBCT measurements between sexes and tooth type, while the ANOVA and Pearson chi-squared test were used to determine the correlations with age groups and types of ridge morphology, respectively. To compare the left and right readings for first and second molars in the same patient, the paired t test was performed (α=.05 for all tests). RESULTS The Pearson correlation showed a strong agreement between the 2 examiners with an interobserver reliability of 87.3%. Significant difference was noted in all dimensional measurements when comparing right and left first and second molars (P<.001). The degree of concavity was significantly different (P<.05), except for the depth of the concavity at the left molars (P=.075). The type C ridge (51.7%) was the most prevalent ridge among a Malaysian population. Only dimensional measurements were significantly different when compared among age groups (P<.05). Ridge width and height were significantly greater in men (P<.05). Men exhibited greater concavity depth than women in the left second molar region (P=.03). CONCLUSIONS Lingual concavity was found in the mandible in 32.8% of a Malaysian population. Significant differences were found in dimensional measurements and degree of concavity between left and right first and second molars, with deeper concavity depth found in second molars. Significant age and sex-related variations were found in the dimensional measurements of the mandible between left and right sides with no significant difference in degree of concavity.
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Affiliation(s)
- Wan Yee Tan
- Predoctoral student, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia.
| | - Jacklyn Zhi Ling Ng
- Predoctoral student, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia
| | - Ranjeet Ajit Bapat
- Senior Lecturer, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia
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Cunha RM, Souza FÁ, Hadad H, Poli PP, Maiorana C, Carvalho PSP. Accuracy evaluation of computer-guided implant surgery associated with prototyped surgical guides. J Prosthet Dent 2021; 125:266-272. [DOI: 10.1016/j.prosdent.2019.07.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 07/11/2019] [Accepted: 07/11/2019] [Indexed: 10/24/2022]
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22
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Kumar M, Madi M, Pentapati KC, Vineetha R. Reliability of Linear and Curvilinear Measurements on Cone-Beam Computed Tomography Images for the Evaluation of Implant Sites and Jaw Pathologies. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLÍNICA INTEGRADA 2021. [DOI: 10.1590/pboci.2021.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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23
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Gandhi Y. Dimensional changes in soft tissue as a plausible cause for error in computer-aided design and computer-aided manufacturing stent-guided implant osteotomy. Natl J Maxillofac Surg 2020; 11:302-306. [PMID: 33897200 PMCID: PMC8051656 DOI: 10.4103/njms.njms_51_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/17/2020] [Accepted: 10/23/2020] [Indexed: 12/02/2022] Open
Abstract
Dental implants have been in vogue for more than three decades as a successful mode of rehabilitation of lost dentition. With time, there have been updates in methods and science including a positive tilt toward incorporation of digital technology into treatment protocols. This report elucidates a rare case of faulty osteotomy preparation through a computer-aided design computer-aided manufacturing stent that was detected and corrected before implant placement. The manuscript also emphasizes the possible shrinkage of soft-tissue graft beyond the normal postulated time frame and the importance of periodical checks on the drilling protocol throughout the flapless placement procedure even though it may have been seamlessly planned on the digital platform.
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Affiliation(s)
- Yazad Gandhi
- Department of Oral and Maxillofacial Surgery, Saifee Hospital, Mumbai, Maharashtra, India
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Tao B, Shen Y, Sun Y, Huang W, Wang F, Wu Y. Comparative accuracy of cone-beam CT and conventional multislice computed tomography for real-time navigation in zygomatic implant surgery. Clin Implant Dent Relat Res 2020; 22:747-755. [PMID: 33112508 DOI: 10.1111/cid.12958] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 09/04/2020] [Accepted: 10/04/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Cone-beam computed tomography (CBCT) and conventional multislice CT (MSCT) are both used in zygomatic implant navigation surgery but the superiority of one technique versus the other remains unclear. PURPOSE This study compared the accuracy of CBCT and MSCT in zygomatic implant navigation surgery by calculating the deviations of implants. MATERIAL AND METHODS Patients with severely atrophic maxillae were classified into two groups according to the use of CBCT- or MSCT-guided navigation system. The entry and apical distance deviation, and the angle deviation of zygomatic implants were measured on fused operation images. A linear effect model was used for analysis, with statistical significance set at P < .05. RESULTS A total of 72 zygomatic implants were inserted as planned in 23 patients. The comparison of deviations in CBCT and MSCT groups showed a mean (± SD) entry deviation of 1.69 ± 0.59 mm vs 2.04 ± 0.78 mm (P = .146), apical deviation of 2 ± 0.68 mm vs 2.55 ± 0.85 (P < .001), and angle deviation of 2.32 ± 1.02° vs 3.23 ± 1.21° (P = .038). CONCLUSION Real-time zygomatic implant navigation surgery with CBCT may result in higher values for accuracy than MSCT.
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Affiliation(s)
- Baoxin Tao
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yihan Shen
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yuanyuan Sun
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Wei Huang
- Department of Oral Implantology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Feng Wang
- Department of Oral Implantology, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
| | - Yiqun Wu
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China
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Bernaerts A, Barbier L, Abeloos J, De Backer T, Bosmans F, Vanhoenacker FM, Casselman J. Cone Beam Computed Tomography Imaging in Dental Implants: A Primer for Clinical Radiologists. Semin Musculoskelet Radiol 2020; 24:499-509. [PMID: 33036038 DOI: 10.1055/s-0040-1701496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
With the introduction of cone beam computed tomography (CBCT) into dentistry in the 1990s, radiologists have become more frequently involved in dental implant planning. This article describes the information that should be included in a radiology report to achieve a successful implantation. The justification to use CBCT during the preoperative planning phase is based on the need to evaluate patient-specific anatomy in detail (general condition of the jaw, bone quantity, and bone quality), the application of more advanced surgical techniques (maxillary sinus augmentation procedure, zygomatic implants), and the integrated presurgical planning and virtual patient approach. Postoperatively, CBCT is used when implant retrieval is anticipated and two-dimensional radiographs have not provided sufficient information, for evaluation of graft healing, or to assess complications, mostly related to neurovascular trauma.
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Affiliation(s)
- Anja Bernaerts
- Department of Radiology, GZA Hospitals, Antwerp, Belgium
| | - Lieven Barbier
- Training Center for Dental Students of the KU Leuven, AZ Sint-Jan Brugge-Oostende AV, Bruges, Belgium
| | - Johan Abeloos
- Department of Maxillo-Facial Surgery, AZ Sint-Jan Brugge-Oostende AV, Bruges, Belgium
| | - Tom De Backer
- Department of Maxillo-Facial Surgery, AZ Sint-Jan Brugge-Oostende AV, Bruges, Belgium
| | - Frederik Bosmans
- Department of Radiology, Antwerp University Hospital, Edegem, Belgium.,Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Filip M Vanhoenacker
- Department of Radiology, Antwerp University Hospital, Edegem, Belgium.,Department of Radiology, AZ Sint-Maarten, Mechelen, Belgium.,Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Jan Casselman
- Department of Radiology, GZA Hospitals, Antwerp, Belgium.,Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.,Department of Radiology, AZ Sint-Jan Brugge-Oostende AV, Bruges, Belgium
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26
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Hashemipoor M, Asghari N, Mohammadi M, Kalantari M, Arabsolghar M, Ranjbar H. Radiological and histological evaluation of horizontal ridge augmentation using corticocancellous freeze-dried bone allograft with and without autogenous bone: A randomized controlled clinical trial. Clin Implant Dent Relat Res 2020; 22:582-592. [PMID: 32902105 DOI: 10.1111/cid.12935] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE The purpose of this study was radiological and histological evaluation of horizontal ridge augmentation using corticocancellous freeze-dried bone allograft (FDBA) with and without autogenous bone (AB). MATERIALS AND METHODS The present research was conducted on 42 patients (27 females and 15 males) with insufficient width of edentulous ridge. The patients were randomly assigned into two groups, FDBA alone + collagen membrane (n = 21) and the combined FDBA and AB + collagen membrane (n = 21). The horizontal alveolar ridge dimensions were measured using cone-beam computerized tomography before and 6 months after alveolar ridge augmentation. At the time of insertion of implants, biopsy of new bone was taken from 11 patients in each group and was analyzed histologically. The obtained data were statistically analyzed with paired t test and two-sample t test. The registration number was IRCT201109165305N3. RESULTS The mean ± SD ridge width gain after 6 months at the distance of 0, 2, 4, and 6 mm from crest of alveolar ridge was 2.78 ± 1.44, 3.05 ± 1.21, 2.82 ± 1.62, and 2.23 ± 1.95 mm in the FDBA group and 2.40 ± 1.60, 3.10 ± 1.80, 3.60 ± 1.87, and 2.65 ± 2.39 mm in the combined group, respectively, which was statistically significant in both groups using paired t test (P < .001). However, the difference between two groups analyzed by two-sample t test was not statistically significant (P > .05). Amount of new bone generation, remained particles, and connective tissue was not statistically different between two groups (P = .367, P = .428, and P = .598, respectively). CONCLUSION Based on the results of this study, corticocancellous FDBA granules along with collagen membrane can successfully be used for horizontal augmentation of edentulous ridge, and adding AB to the granules of FDBA does not significantly increase the quality and quantity of regenerated bone.
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Affiliation(s)
- Mahtab Hashemipoor
- Department of Periodontics, Kashan Dental School, Kashan University of Medical Sciences, Kashan, Iran
| | - Najmeh Asghari
- Henry M. Goldman School of Dental Medicine, Boston University, Boston, Massachusetts, USA
| | - Mohammad Mohammadi
- Oral and Dental Diseases Research Center and Department of Periodontics, Kerman Dental School, Kerman University of Medical Sciences, Kerman, Iran
| | - Mahsa Kalantari
- Department of Oral and Maxillofacial Pathology, and Oral and Dental Diseases Research Center, Kerman Dental School, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohaddese Arabsolghar
- Oral and Dental Diseases Research Center and Department of Periodontics, Kerman Dental School, Kerman University of Medical Sciences, Kerman, Iran
| | - Hadi Ranjbar
- Mental Health Research Center, Psychosocial Health Research Institute, Iran University of Medical Sciences, Tehran, Iran
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Impact of Matching Point Selections on Image Registration Accuracy between Optical Scan and Computed Tomography. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3285431. [PMID: 32802841 PMCID: PMC7426779 DOI: 10.1155/2020/3285431] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 07/21/2020] [Indexed: 01/08/2023]
Abstract
The point-based surface registration method involves the manual selection process of paired matching points on the data of computed tomography and optical scan. The purpose of this study was to investigate the impact of selection error and distribution of fiducial points on the accuracy of image matching between 3-dimensional (3D) images in dental planning software programs. Computed tomography and optical scan images of a partial edentulous dental arch were obtained. Image registration of the optical scan image to computed tomography was performed using the point-based surface registration method in planning software programs under different conditions of 3 fiducial points: point selection error (0, 1, or 2 mm), point distribution (unilateral, bilateral), and planning software (Implant Studio, Blue Bio Plan) (n = 5 per condition, N = 60). The accuracy of image registration at each condition was evaluated by measuring linear discrepancies between matched images at X, Y, and Z axes. Kruskal-Wallis test, Mann-Whitney U test with Bonferroni correction, and 3-way analysis of variance were used to statistically analyse the measurement data (α = 0.05). No statistically significant difference was exhibited between the 0 and 1 mm point mismatch conditions in either unilateral or bilateral point distributions. The discrepancy values in the 2 mm mismatch condition were significantly different from the other mismatch conditions, especially in the unilateral point distribution (P < 0.05). Strong interactions among point selection error, distribution, and software programs on the image registration were found (P < 0.001). Minor matching point selection error did not influence the accuracy of point-based automatic image registration in the software programs. When the fiducial points are distributed unilaterally with large point selection error, the image matching accuracy could be decreased.
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Pitale U, Mankad H, Pandey R, Pal PC, Dhakad S, Mittal A. Comparative evaluation of the precision of cone-beam computed tomography and surgical intervention in the determination of periodontal bone defects: A clinicoradiographic study. J Indian Soc Periodontol 2020; 24:127-134. [PMID: 32189840 PMCID: PMC7069118 DOI: 10.4103/jisp.jisp_118_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 10/25/2019] [Accepted: 12/22/2019] [Indexed: 11/04/2022] Open
Abstract
Context Major limitations of conventional radiography are overlapping and lack of 3D information. Surgical exposure, though being able to provide accurate information, provides very little time to plan-out the type of periodontal regeneration required during surgery. Cone Beam Computed Tomography (CBCT) has emerged as a feasible tool and found to be accurate. Unfortunately, in-vivo studies are still scarce. Aim Aim of the present study was to assess the efficacy of CBCT in the detection of periodontal bony defects while determining its quantitative precision in the measurement of alveolar bone height as against the open flap debridement (OFD) procedure which is set as the gold standard. Setting and Design Present study is a cross-sectional study. Materials and Methods The present study includes patients with Chronic Periodontitis indicated for periodontal surgeries. Bone defects were measured with the help of CBCT and with William's periodontal probe during surgical intervention and compared. Statistical Analysis Measurements were compared with Student's t-test; unpaired t-test & correlation were tested with Pearson's correlation coefficient test. P < 0.05 was considered statistically significant. Results The mean CBCT & surgical value of palatal/lingual & distal sites of anterior teeth showed statistically significant difference (P = 0.001). All the values for posterior teeth were statistically non-significant. Conclusion Statistically CBCT & clinical measurement with OFD have similar potential of accuracy to access the bony topography but CBCT provides good accessibility to visualize the sites which are difficult to access during surgical interventions like palatal sites & the distal sites of the posterior teeth.
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Affiliation(s)
- Unnati Pitale
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Hitesh Mankad
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Rohit Pandey
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Pritish Chandra Pal
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
| | - Shikha Dhakad
- Department of Periodontics, Chhattisgarh Dental College and Research Institute, Rajnandgaon, Chhattisgarh, India
| | - Antush Mittal
- Department of Periodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India
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Radiographic Assessment of Nasopalatine Canal Using Cone Beam Computed Tomography. J Craniofac Surg 2020; 31:e4-e6. [PMID: 31403513 DOI: 10.1097/scs.0000000000005805] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To assess the morphology of nasopalatine canal and to determine the variation of this canal in correlations to age and gender in Iraqi sample using cone beam computed tomography (CBCT). MATERIALS AND METHODS A total of 200 requested CBCT images for nasopalatine canal evaluation before dental implantology at the anterior maxillary region. The morphology of canals was classified into 3 groups in coronal cross-sections. The effects of age and gender were also measured. RESULTS The study comprised 100 males and 100 females with mean age of 30.64 ± 9.46 years. Most of the cases showed Y-shape configuration type III 43.5% followed by type I single canal 35.5%, and type II with 2 parallel canals 21%, CONCLUSION:: Due to the wide variation in the morphology of nasopalatine canals, it is highly recommended to perform CBCT evaluation to the anterior maxilla before dental implantology in order to prevent any damage to the neurovascular bundle.
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30
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Kim JE, Kim SJ, Kwon DH, Shim JS, Kim JH. Mounting casts on a mechanical articulator by using digital multisource data: A dental technique. J Prosthet Dent 2020; 125:41-45. [PMID: 32033790 DOI: 10.1016/j.prosdent.2019.10.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/30/2019] [Accepted: 10/30/2019] [Indexed: 11/18/2022]
Abstract
A facebow transfer is typically used for mounting a maxillary gypsum cast in an ideal location in a mechanical articulator. However, the facebow transfer procedure is difficult and may cause the patient discomfort. This proposed technique uses a patient's cone beam computed tomography (CBCT) data to reproduce the occlusal plane in relation to digital articulator scan data, align the patient's gypsum cast or intraoral scan data on the reproduced plane, and then transfer the data to a mechanical articulator.
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Affiliation(s)
- Jong-Eun Kim
- Clinical Assistant Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, SeodaemunGu, Seoul, Republic of Korea
| | - Su-Jin Kim
- Graduate student, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Dong-Ho Kwon
- Researcher, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - June-Sung Shim
- Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Jee-Hwan Kim
- Associate Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
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31
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Ogawa M, Katagiri S, Koyanagi T, Maekawa S, Shiba T, Ohsugi Y, Takeuchi Y, Ikawa T, Takeuchi S, Sekiuchi T, Arai Y, Kazama R, Wakabayashi N, Izumi Y, Iwata T. Accuracy of cone beam computed tomography in evaluation of palatal mucosa thickness. J Clin Periodontol 2020; 47:479-488. [PMID: 31912948 DOI: 10.1111/jcpe.13254] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 11/26/2019] [Accepted: 01/04/2020] [Indexed: 12/12/2022]
Abstract
AIM The purpose of this study was to investigate the accuracy of the measurement of palatal mucosa thickness using cone beam computed tomography (CBCT) and to create a conversion formula to evaluate palatal mucosa thickness more accurately. We then evaluated the palatal mucosa thickness in a Japanese population using CBCT and the conversion formula. MATERIALS AND METHODS We evaluated palatal mucosa thickness in 10 healthy subjects at 15 sites using CBCT, digital impression, and K file. Multiple regression analysis was performed to create a conversion formula to measure thickness accurately. We then obtained CBCT data from 174 patients retrospectively, applied the conversion formula, and evaluated palatal mucosa thickness. RESULTS Sites of measurement affected measurement error. Measurement using CBCT was 0.34 ± 0.04 mm smaller than actual measurement; therefore, a conversion formula was created. Male, age ≥60 years, and probing pocket depth ≥4 mm had significant and positive associations with palatal mucosa thickness; however, no association was observed between bleeding on probing and palatal mucosa thickness. CONCLUSION CBCT is useful for the noninvasive and accurate measurement of palatal mucosa thickness.
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Affiliation(s)
- Miho Ogawa
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sayaka Katagiri
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tatsuro Koyanagi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shogo Maekawa
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiko Shiba
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yujin Ohsugi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yasuo Takeuchi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiro Ikawa
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shogo Takeuchi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Sekiuchi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuki Arai
- Department of Removable Partial Prosthodontics, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ryunosuke Kazama
- Department of Removable Partial Prosthodontics, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Noriyuki Wakabayashi
- Department of Removable Partial Prosthodontics, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Oral Care Perio Center, Southern TOHOKU Research Institute for Neuroscience, Southern TOHOKU General Hospital, Fukushima, Japan
| | - Takanori Iwata
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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32
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Three-dimensional analysis of temporomandibular joint in Chinese adults with normal occlusion and harmonious skeleton. Oral Radiol 2019; 36:371-382. [PMID: 31823105 DOI: 10.1007/s11282-019-00415-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 11/06/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE This study aimed to analyze the detailed three-dimensional measurements of temporomandibular joint (TMJ) in Chinese adults with normal occlusion and harmonious skeleton. METHODOLOGY In 51 subjects 102 joints were analyzed using Anatomage Invivo dental 5.4. The measurements include: joints' parameters, position, angulation, and inclination of the condyle and articular fossa as well as 3D volumetric of the joint-spaces. All measurements were statistically analyzed by paired Student's t test to find out the differences between the left- and right sides. Pearson correlation coefficient test was done to figure out the relationship of the TMJ parts in the normal situation. RESULTS The inter-condyle distances medially, geometrically, and laterally were 90.2 ± 5.2,107 ± 6.1, and 125 ± 5.5 mm, respectively. However, the 102 condyles were angulated on three planes 54.9º ± 11.2, 71.8º ± 7.3, and 12.5º ± 6.3 at vertical-, horizontal-, and midsagittal planes, respectively. The joint spaces measurements were 2.6 ± 0.7 mm, 2.5 ± 0.8 mm, 2.4 ± 0.7 mm, and 3.3 ± 0.7 mm for anterior-, medial-, posterior-, and superior joints, respectively. The total volume of the whole joint-space was 404.3 ± 71mm3. The left condyle position was on the centric position whereas the right condyle was eccentric (slightly anterior). CONCLUSION Chinese subjects are characterized by wide inter-fossa distance and inter-condyle distance; however, no significant correlations with joint spaces in normal occlusion were found. The asymmetries between right- and left mandibular condyle were distinguished in angular and linear-vertical measurements. Finally, this study could be considered as reference data for upcoming research in the Chinese population.
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Fokas G, Vaughn VM, Scarfe WC, Bornstein MM. Accuracy of linear measurements on CBCT images related to presurgical implant treatment planning: A systematic review. Clin Oral Implants Res 2019; 29 Suppl 16:393-415. [PMID: 30328204 DOI: 10.1111/clr.13142] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of this systematic review was to identify, review, analyze, and summarize available evidence on the accuracy of linear measurements when using maxillofacial cone beam computed tomography (CBCT) specifically in the field of implant dentistry. MATERIAL AND METHODS The search was undertaken in April 2017 in the National Library of Medicine database (Medline) through its online site (PubMed), followed by searches in the Cochrane, EMBASE, ScienceDirect, and ProQuest Dissertation and Thesis databases. The main inclusion criterion for studies was that linear CBCT measurements were performed for quantitative assessment (e.g., height, width) of the alveolar bone at edentulous sites or measuring distances from anatomical structures related to implant dentistry. The studies should compare these values to clinical data (humans) or ex vivo and/or experimental (animal) findings from a "gold standard." RESULTS The initial search yielded 2,516 titles. In total, 22 studies were included in the final analysis. Of those, two were clinical and 20 ex vivo investigations. The major findings of the review indicate that CBCT provides cross-sectional images that demonstrate high accuracy and reliability for bony linear measurements on cross-sectional images related to implant treatment. A wide range of error has been reported when performing linear measurements on CBCT images, with both over- and underestimation of dimensions in comparison with a gold standard. A voxel size of 0.3 to 0.4 mm is adequate to provide CBCT images of acceptable diagnostic quality for implant treatment planning. CONCLUSIONS CBCT can be considered as an appropriate diagnostic tool for 3D preoperative planning. Nevertheless, a 2 mm safety margin to adjacent anatomic structures should be considered when using CBCT. In clinical practice, the measurement accuracy and reliability of linear measurements on CBCT images are most likely reduced through factors such as patient motion, metallic artefacts, device-specific exposure parameters, the software used, and manual vs. automated procedures.
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Affiliation(s)
- George Fokas
- Oral Rehabilitation, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Vida M Vaughn
- Vida M. Vaughn, Kornhauser Health Science Library, University of Louisville, Louisville, Kentucky
| | - William C Scarfe
- Radiology and Imaging Science, Department of Surgical/Hospital Dentistry, University of Louisville School of Dentistry, Louisville, Kentucky
| | - Michael M Bornstein
- Oral and Maxillofacial Radiology, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
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Al-Ekrish AA, Al-Shawaf R, Alfaleh W, Hörmann R, Puelacher W, Widmann G. Comparability of dental implant site ridge measurements using ultra-low-dose multidetector row computed tomography combined with filtered back-projection, adaptive statistical iterative reconstruction, and model-based iterative reconstruction. Oral Radiol 2018; 35:280-286. [PMID: 30484207 PMCID: PMC6685921 DOI: 10.1007/s11282-018-0350-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 09/20/2018] [Indexed: 01/08/2023]
Abstract
Objective To assess the linear measurements of edentulous ridges recorded from multidetector row computed tomography (MDCT) images obtained by a previously untested ultra-low dose in combination with filtered back-projection (FBP), adaptive statistical iterative reconstruction (ASIR), and model-based iterative reconstruction (MBIR). Methods Three cadavers were imaged using a reference protocol with a standard dose and FBP (volume CT dose index (CTDIvol): 29.4 mGy) and two ultra-low-dose protocols, LD1 and LD2 (CTDIvol: 0.53 and 0.29 mGy). All test examinations were reconstructed with FBP, ASIR 50, ASIR 100, and MBIR. Linear measurements from the images of the edentulous ridges recorded from the test protocols were compared with those from the reference using a one-sample t test, Bland–Altman plots, and linear regression. Statistical significance was set at a p value of 0.05. Results The one-sample t test demonstrated a statistically significant difference between the measurements from the reference protocol and all test protocols. The difference was not clinically significant for the following three test protocols: LD1/FBP, LD1/ASIR 50, and LD2/FBP. Bland–Altman plots with linear regression showed no systematic variation between the measurements obtained with the reference protocol and these three test protocols. Conclusions The lowest-dose protocol to demonstrate comparable measurements with a standard MDCT dose was CTDIvol 0.29 mGy with FBP. These results must be considered with caution for areas of the jaws with thin cortication. The results in areas of thin cortication should be verified by studies with larger sample sizes at such areas and comparison with true gold standard measurements. Electronic supplementary material The online version of this article (10.1007/s11282-018-0350-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Asma'a Abdurrahman Al-Ekrish
- Division of Oral and Maxillofacial Radiology, Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, PO Box 60169, Riyadh, 11545, Saudi Arabia.
| | - Reema Al-Shawaf
- Division of Oral and Maxillofacial Radiology, Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, PO Box 60169, Riyadh, 11545, Saudi Arabia
| | - Wafa Alfaleh
- Division of Oral and Maxillofacial Radiology, Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, PO Box 60169, Riyadh, 11545, Saudi Arabia
| | - Romed Hörmann
- Division of Clinical and Functional Anatomy, Medical University of Innsbruck, Müllerstrasse 59, 6020, Innsbruck, Austria
| | - Wolfgang Puelacher
- Department of Craniomaxillofacial Surgery, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - Gerlig Widmann
- Department of Radiology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
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35
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Al-Ekrish AA, Alfaleh W, Hörmann R, Alabdulwahid A, Puelacher W, Widmann G. Localization of the inferior alveolar canal using ultralow dose CT with iterative reconstruction techniques. Dentomaxillofac Radiol 2018; 47:20170477. [PMID: 29791199 PMCID: PMC6326396 DOI: 10.1259/dmfr.20170477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Objectives: To compare subjective and objective localization of the inferior alveolar
canal (IAC) on multidetector CT (MDCT) images obtained by ultralow doses in
combination with the reconstruction techniques of filtered backprojection
(FBP), adaptive statistical iterative reconstruction (ASIR), or model-based
iterative reconstruction (MBIR) as compared to standard dose MDCT and
FBP. Methods: Three cadavers were imaged with a reference standard dose MDCT examination
(volume CT dose index: 29.4 mGy) reconstructed with FBP and 5 low dose
protocols (LD1-5) (volumeCT dose index: 4.19, 2.64, 0.99, 0.53, 0.29 mGy)
reconstructed with FBP, ASIR 50, ASIR 100, and MBIR. Linear measurements
from the crest of the ridge to the roof of the IAC were recorded. The
results from the test protocols were compared with those from the reference
using Bland–Altman plots. Results: Only three test protocols allowed the identification of the position of the
IAC on all the sample sites: LD1/FBP and LD1/ASIR 100 and LD2/FBP. All three
protocols allowed identification of the IAC with comparable results to the
reference dose protocol; the 95% confidence interval limits for the
measurement differences were ± 0.41 mm, but the
differences were not statistically significant. The calculated effective
dose for the LD2 protocol, for a scan length of 5 cm, was 27.7
µSv. Conclusions: Using FBP, comparable IAC measurements were achieved with 91%
reduction in dose compared with a standard exposure protocol. The use of
ASIR and MBIR did not improve identification of the IAC in MDCT low dose
images.
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Affiliation(s)
- Asmaa A Al-Ekrish
- 1 Department of Oral Medicine and Diagnostic Sciences, King Saud University, College of Dentistry , Riyadh , Saudi Arabia
| | - Wafa Alfaleh
- 1 Department of Oral Medicine and Diagnostic Sciences, King Saud University, College of Dentistry , Riyadh , Saudi Arabia
| | - Romed Hörmann
- 2 Division of Clinical and Functional Anatomy, Medical University of Innsbruck , Innsbruck , Austria
| | - Ameera Alabdulwahid
- 1 Department of Oral Medicine and Diagnostic Sciences, King Saud University, College of Dentistry , Riyadh , Saudi Arabia
| | - Wolfgang Puelacher
- 3 Department Chair Craniomaxillofacial Surgery, Medical University of Innsbruck , Innsbruck , Austria
| | - Gerlig Widmann
- 4 Department of Radiology, Medical University of Innsbruck , Innsbruck , Austria
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Fontão FNGK, Luiz J, de Freitas RM, Padovan LEM, Thomé G, Faot F. Real Versus Virtual Position of Single Implants Installed in Premaxilla via Guided Surgery: A Proof of Concept Analyzing Positional Deviations. J ORAL IMPLANTOL 2018; 44:463-469. [PMID: 30011244 DOI: 10.1563/aaid-joi-d-17-00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this research letter was to report the results of a pilot study designed to compare the real and virtual position of implants placed using computer-guided flapless implant surgery for single restorations in the premaxilla. A total of 8 patients (2 men and 6 women) with a mean age of 40 years old (range: 32-73 years) had a total of 11 implants inserted using a tooth-supported stereolithographic guide. After implant placement, the positions (coronal, central, and apical) and angulation of the implants installed in relation to those planned were determined via the superposition of pre- and postoperative 3-dimensional models using Dental Slice software (Bioparts, Brasília, Brazil). The mean angular deviation was 2.54° ± 0.71°. The deviations found for the coronal, central, and apical positions were 1.3 ± 0.77 mm, 1.49 ± 0.58 mm, and 2.13 ± 1.32 mm, respectively.
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Affiliation(s)
| | - Jaques Luiz
- 2 Private practice, Curitiba, Paraná, Brazil
| | - Rubens Moreno de Freitas
- 1 Department of Postgraduation, Latin American Institute of Dental Research and Education - ILAPEO, Curitiba, Paraná, Brazil
| | - Luis Eduardo Marques Padovan
- 1 Department of Postgraduation, Latin American Institute of Dental Research and Education - ILAPEO, Curitiba, Paraná, Brazil
| | - Geninho Thomé
- 1 Department of Postgraduation, Latin American Institute of Dental Research and Education - ILAPEO, Curitiba, Paraná, Brazil
| | - Fernanda Faot
- 3 School of Dentistry, Department of Restorative Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil
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Roque-Torres GD, Peyneau PD, Dantas da Costa E, Bóscolo FN, Maria de Almeida S, Ribeiro LW. Correlation between midline deviation and condylar position in patients with Class II malocclusion: A cone-beam computed tomography evaluation. Am J Orthod Dentofacial Orthop 2018; 154:99-107. [DOI: 10.1016/j.ajodo.2017.10.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 09/01/2017] [Accepted: 09/01/2017] [Indexed: 12/26/2022]
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39
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Vestin Fredriksson M, Öhman A, Flygare L, Tano K. When Maxillary Sinusitis Does Not Heal: Findings on CBCT Scans of the Sinuses With a Particular Focus on the Occurrence of Odontogenic Causes of Maxillary Sinusitis. Laryngoscope Investig Otolaryngol 2017; 2:442-446. [PMID: 29299521 PMCID: PMC5743152 DOI: 10.1002/lio2.130] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2017] [Indexed: 11/11/2022] Open
Abstract
Objectives This study sought to investigate the proportion of patients with suspected sinusitis referred for radiological examination who have radiologically verified sinusitis of odontogenic origin and to describe this type of sinusitis. Study Design This investigation is a retrospective study. Methods A total of 303 sinus examinations involving cone beam computed tomography (CBCT) performed at Sunderby Hospital, Luleå, Sweden in 2012 were independently reviewed by two radiologists. The number of cases of maxillary sinusitis and the correlation between maxillary sinusitis and odontogenic infections were determined. Results Overall, 24% of the verified cases of sinusitis were odontogenic. An odontogenic origin was identified in 40% of unilateral maxillary sinusitis cases but only 6% of bilateral maxillary sinusitis cases (p = 0.0015). Forty-nine out of 54 patients with periapical destruction had adjacent mucosal swelling in the maxillary sinus, but only 15 of these patients satisfied the criteria for sinusitis. Conclusion The present study confirms the close relationship between odontogenic infections and unilateral maxillary sinusitis. Level of Evidence 4.
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Affiliation(s)
| | - Anders Öhman
- Department of RadiologySunderby HospitalLuleåSweden
| | | | - Krister Tano
- Department of Clinical SciencesOtorhinolaryngology, Umeå UniversityUmeåSweden
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40
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Rios HF, Borgnakke WS, Benavides E. The Use of Cone-Beam Computed Tomography in Management of Patients Requiring Dental Implants: An American Academy of Periodontology Best Evidence Review. J Periodontol 2017; 88:946-959. [DOI: 10.1902/jop.2017.160548] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Hector F. Rios
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI
| | - Wenche S. Borgnakke
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI
| | - Erika Benavides
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI
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de Oliveira MVL, Santos AC, Paulo G, Campos PSF, Santos J. Application of a newly developed software program for image quality assessment in cone-beam computed tomography. Imaging Sci Dent 2017; 47:75-86. [PMID: 28680843 PMCID: PMC5489672 DOI: 10.5624/isd.2017.47.2.75] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 03/01/2017] [Accepted: 04/24/2017] [Indexed: 11/18/2022] Open
Abstract
PURPOSE The purpose of this study was to apply a newly developed free software program, at low cost and with minimal time, to evaluate the quality of dental and maxillofacial cone-beam computed tomography (CBCT) images. MATERIALS AND METHODS A polymethyl methacrylate (PMMA) phantom, CQP-IFBA, was scanned in 3 CBCT units with 7 protocols. A macro program was developed, using the free software ImageJ, to automatically evaluate the image quality parameters. The image quality evaluation was based on 8 parameters: uniformity, the signal-to-noise ratio (SNR), noise, the contrast-to-noise ratio (CNR), spatial resolution, the artifact index, geometric accuracy, and low-contrast resolution. RESULTS The image uniformity and noise depended on the protocol that was applied. Regarding the CNR, high-density structures were more sensitive to the effect of scanning parameters. There were no significant differences between SNR and CNR in centered and peripheral objects. The geometric accuracy assessment showed that all the distance measurements were lower than the real values. Low-contrast resolution was influenced by the scanning parameters, and the 1-mm rod present in the phantom was not depicted in any of the 3 CBCT units. Smaller voxel sizes presented higher spatial resolution. There were no significant differences among the protocols regarding artifact presence. CONCLUSION This software package provided a fast, low-cost, and feasible method for the evaluation of image quality parameters in CBCT.
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Affiliation(s)
- Marcus Vinicius Linhares de Oliveira
- Department of Health Technology and Biology, Federal Institute of Bahia, Salvador, BA, Brazil.,Department of Interactive Processes of Organs and Systems, Institute of Health Sciences, Federal University of Bahia, Salvador, BA, Brazil
| | - António Carvalho Santos
- Department of Complementary Sciences, Coimbra Health School, Polytechnic Institute of Coimbra, Portugal
| | - Graciano Paulo
- Department of Medical Imaging and Radiotherapy, Coimbra Health School, Polytechnic Institute of Coimbra, Portugal
| | - Paulo Sergio Flores Campos
- Department of Interactive Processes of Organs and Systems, Institute of Health Sciences, Federal University of Bahia, Salvador, BA, Brazil
| | - Joana Santos
- Department of Medical Imaging and Radiotherapy, Coimbra Health School, Polytechnic Institute of Coimbra, Portugal
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42
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de Sousa ET, Pinheiro MA, Maciel PP, Sales MAO. Influence of enhancement filters in apical bone loss measurement: A cone-beam computed tomography study. J Clin Exp Dent 2017; 9:e516-e519. [PMID: 28469815 PMCID: PMC5410670 DOI: 10.4317/jced.53496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 11/27/2016] [Indexed: 12/05/2022] Open
Abstract
Background The use of cone-beam computed tomography images (CBCT) providing a better assessment of bone injuries, although the sensibility of lesions measurement might be improved by the use of enhancement filters. Objective: This study aimed to analyze the influence of enhancement filters in apical bone loss measurement. Material and Methods Eighteen CBCT cases randomly selected of apical bone loss were evaluated. The analyses were carried out following the evaluation in axial, coronal and sagittal protocols, using enhancement filters as Hard, Normal, and Very Sharp. The variables were statistically analyzed by Friedman and Wilcoxon test, Spearman’s rho, and intraclass correlation coefficient. Results The differences between filters in axial and sagittal protocols were significant (p<0.05); however, this was not observed in the coronal slice. The use of Hard filter demonstrates better results than Very Sharp and Normal filter, improving significantly the bone loss measurement. A strong, significant and positive correlation was noted for all filters (with p< 0.001), such as a strong agreement between the variables, when the Normal filter was used as a reference. Conclusions The use of enhancement filters increases the sensitivity of alveolar bone loss measurement, with relative advantage for Hard filter. Key words:Cone-Beam computed tomography. endodontics. periapical periodontitis. image enhancement. alveolar bone loss.
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Affiliation(s)
- Emerson-Tavares de Sousa
- DDS, MS. Ph.D. Student. Faculty of Dentistry at Piracicaba - Campinas University, Piracicaba-Brazil
| | - Mayara-Abreu Pinheiro
- DDS, MS. Ph.D. Student. Faculty of Dentistry at Piracicaba - Campinas University, Piracicaba-Brazil
| | | | - Marcelo-Augusto-Oliveira Sales
- DDS, MSc, Ph.D. Department of Clinics and Social Dentistry, School of Dentistry, Federal University of Paraiba, Joao Pessoa-Brazil
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43
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Bohner LOL, Tortamano P, Marotti J. Accuracy of linear measurements around dental implants by means of cone beam computed tomography with different exposure parameters. Dentomaxillofac Radiol 2017; 46:20160377. [PMID: 28267928 DOI: 10.1259/dmfr.20160377] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVES The aim of this study was to determine the accuracy of linear measurements around dental implants when using CBCT unit devices presenting different exposure parameters. METHODS Dental implants (n = 18) were installed in the maxilla of human dry skulls, and images were obtained using two CBCT devices: G1-Care Stream 9300 (70 kVp, 6.3 mA, voxel size 0.18 mm, field of view 8 × 8 cm; Carestream Health, Rochester, NY) and G2-R100 Veraview® (75 kVp, 7.0 mA, voxel size 0.125 mm, field of view 8 × 8 cm; J Morita, Irvine, CA). Measurements of bone thickness were performed at three points located (A) in the most apical portion of the implant, (B) 5 mm above the apical point and (C) in the implant platform. Afterwards, values were compared with real measurements obtained by an optical microscopy [control group (CG)]. Data were statistically analyzed with the significance level of p ≤ 0.05. RESULTS There was no statistical difference for the mean values of bone thickness on Point A (CG: 4.85 ± 2.25 mm, G1: 4.19 ± 1.68 mm, G2: 4.15 ± 1.75 mm), Point B (CG: 1.50 ± 0.84 mm, G1: 1.61 ± 1.27 mm; G2: 1.68 ± 0.82 mm) and Point C (CG: 1.78 ± 1.33 mm, G1: 1.80 ± 1.09 mm; G2: 1.64 ± 1.11 mm). G1 and G2 differed in bone thickness by approximately 0.76 mm for Point A, 0.36 mm for Point B and 0.08 mm for Point C. A lower intraclass variability was identified for CG (Point A = 0.20 ± 0.25; Point B = 0.15 ± 0.20; Point C = 0.06 ± 0.05 mm) in comparison with G1 (Point A = 0.56 ± 0.52; Point B = 0.48 ± 0.50; Point C = 0.47 ± 0.56 mm) and G2 (Point A = 0.57 ± 0.51; Point B = 0.46 ± 0.46; Point C = 0.36 ± 0.31 mm). CONCLUSIONS CBCT devices showed acceptable accuracy for linear measurements around dental implants, despite the exposure parameters used.
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Affiliation(s)
- Lauren O L Bohner
- 1 Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil.,2 Department of Prosthodontics and Biomaterials, Center for Implantology, University Hospital RWTH Aachen, Aachen, Germany
| | - Pedro Tortamano
- 1 Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Juliana Marotti
- 2 Department of Prosthodontics and Biomaterials, Center for Implantology, University Hospital RWTH Aachen, Aachen, Germany
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Freire-Maia B, Machado VD, Valerio C, Custódio A, Manzi F, Junqueira J. Evaluation of the accuracy of linear measurements on multi-slice and cone beam computed tomography scans to detect the mandibular canal during bilateral sagittal split osteotomy of the mandible. Int J Oral Maxillofac Surg 2017; 46:296-302. [DOI: 10.1016/j.ijom.2016.11.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 08/11/2016] [Accepted: 11/10/2016] [Indexed: 11/28/2022]
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45
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Contrast-enhanced dual mode imaging: photoacoustic imaging plus more. Biomed Eng Lett 2017; 7:121-133. [PMID: 30603159 DOI: 10.1007/s13534-016-0006-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/16/2016] [Accepted: 11/20/2016] [Indexed: 10/20/2022] Open
Abstract
Conventional biomedical imaging modalities in wide clinical use, such as ultrasound imaging, X-ray computed tomography, magnetic resonance imaging, and positron emission tomography, can provide morphological, anatomical, and functional information about biological tissues. However, single mode imaging in conventional medicine provides only limited information for definitive diagnoses. Thus, combinational diagnosis using multiple imaging modalities has become increasingly important. Recently, photoacoustic imaging (PAI) has gained significant attention, and several PAI prototypes have been used in clinical trials. At the same time, PAI has been tested in combination with conventional imaging modalities. For all these imaging modalities, various contrast-enhancing agents have been developed for various purposes. In this review article, we will focus on recent progress in developing dual mode contrast agents for PAI in combination with other conventional imaging modalities.
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46
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Accuracy of segmentation of tooth structures using 3 different CBCT machines. Oral Surg Oral Med Oral Pathol Oral Radiol 2017; 123:123-128. [DOI: 10.1016/j.oooo.2016.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 07/28/2016] [Accepted: 09/15/2016] [Indexed: 01/03/2023]
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47
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Validity of linear measurements of the jaws using ultralow-dose MDCT and the iterative techniques of ASIR and MBIR. Int J Comput Assist Radiol Surg 2016; 11:1791-801. [PMID: 27255542 DOI: 10.1007/s11548-016-1419-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 05/05/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE To assess the comparability of linear measurements of dental implant sites recorded from multidetector computed tomography (MDCT) images obtained using standard-dose filtered backprojection (FBP) technique with those from various ultralow doses combined with FBP, adaptive statistical iterative reconstruction (ASIR), and model-based iterative reconstruction (MBIR) techniques. The results of the study may contribute to MDCT dose optimization for dental implant site imaging. METHODS MDCT scans of two cadavers were acquired using a standard reference protocol and four ultralow-dose test protocols (TP). The volume CT dose index of the different dose protocols ranged from a maximum of 30.48-36.71 mGy to a minimum of 0.44-0.53 mGy. All scans were reconstructed using FBP, ASIR-50, ASIR-100, and MBIR, and either a bone or standard reconstruction kernel. Linear measurements were recorded from standardized images of the jaws by two examiners. Intra- and inter-examiner reliability of the measurements were analyzed using Cronbach's alpha and inter-item correlation. Agreement between the measurements obtained with the reference-dose/FBP protocol and each of the test protocols was determined with Bland-Altman plots and linear regression. Statistical significance was set at a P-value of 0.05. RESULTS No systematic variation was found between the linear measurements obtained with the reference protocol and the other imaging protocols. The only exceptions were TP3/ASIR-50 (bone kernel) and TP4/ASIR-100 (bone and standard kernels). The mean measurement differences between these three protocols and the reference protocol were within ±0.1 mm, with the 95 % confidence interval limits being within the range of ±1.15 mm. CONCLUSIONS A nearly 97.5 % reduction in dose did not significantly affect the height and width measurements of edentulous jaws regardless of the reconstruction algorithm used.
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48
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Comprehensive three-dimensional cone beam computed tomography analysis of the temporomandibular joint in different vertical skeletal facial patterns. J World Fed Orthod 2016. [DOI: 10.1016/j.ejwf.2016.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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49
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Ersanli S, Arısan V, Bedeloğlu E. Evaluation of the autogenous bone block transfer for dental implant placement: Symphysal or ramus harvesting? BMC Oral Health 2016; 16:4. [PMID: 26813232 PMCID: PMC4728796 DOI: 10.1186/s12903-016-0161-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 01/12/2016] [Indexed: 11/10/2022] Open
Abstract
Background The absence of sufficient bone volume is the most relevant problem in implant dentistry. Grafting from exogenous sources may provide a limited gain but exhibits poor performance in large bone defects. Autogenous bone block transfer (ABBT) from the mandibular symphysis and ramus has been used with varying rates of success. The aim of this study was to compare the efficacy of symphysal and ramus ABBT for the restoration of lost horizontal alveolar bone volume in the anterior maxilla. Implants placed in the augmented areas were also evaluated. Methods The maxillary alveolar bone deficits of 32 patients were treated by similar-sized autogenous bone blocks (7 × 7 × 4 mm) harvested from the symphysis or ramus area. After 4 to 5 months of healing, implants were inserted. At the end of the osseointegration period, the implants were restored by fixed prostheses. Baseline bone thickness was determined by Cone beam computed tomography and was compared to post-op and one-year post-loading bone thickness values where the implants were inserted. Any complications or consequences were noted. The success and survival of the 45 implants were evaluated. The results were analyzed using the Student t-test and Fisher’s exact test (p < 0.05). Results Post-op complications were frequent in both groups. Baseline bone thickness values were similar at the beginning of the study (p = 0.71) and exhibited a significant increase after the ABBT surgery (6.29 (SD 0.86) and 6.01 (SD 0.92) mm in the symphysis and ramus groups, respectively). The amount of bone thickness gain was 4.34 mm (SD: 0.92) and 4.36 mm (SD: 1.01) in the symphysis and ramus groups, respectively. After one year, the mean surface resorption was 0.6 mm (SD: 0.78) and 0.80 mm (SD: 0.56) for the symphysis and ramus groups, respectively (p = 0.089). The success and survival rates of the implants were 94.11 and 96.42 %, respectively. No graft failures were observed. Conclusions Both symphysal and ramus ABBT procedures were successful for the restoration of a horizontal bone defect in the anterior maxilla. Ramus harvesting may be advisable due to fewer complications. Implants placed in the grafted regions exhibited a high success and survival rate within the one-year follow-up period.
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Affiliation(s)
- Selim Ersanli
- Department of Oral Impantology, Faculty of Dentistry, Istanbul University, 34093-Capa, Istanbul, Turkey.
| | - Volkan Arısan
- Department of Oral Impantology, Faculty of Dentistry, Istanbul University, 34093-Capa, Istanbul, Turkey
| | - Elçin Bedeloğlu
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul Aydın University, 34088-Florya, Istanbul, Turkey
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50
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Gönül Y, Bucak A, Atalay Y, Beker-Acay M, Çalişkan A, Sakarya G, Soysal N, Cimbar M, Özbek M. MDCT evaluation of nasopalatine canal morphometry and variations: An analysis of 100 patients. Diagn Interv Imaging 2016; 97:1165-1172. [PMID: 26797526 DOI: 10.1016/j.diii.2015.11.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Revised: 11/02/2015] [Accepted: 11/18/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The goal of this study was to investigate the possible variations in morphology of nasopalatine canal (NPC) morphometry depending on age, gender and absence of anterior incisors using multidetector row computed tomography (MDCT). MATERIALS AND METHODS A total of 100 patients (50 men, 50 women) with a mean age of 43.29±18.81 (SD) years (range: 18-90 years) who have undergone head MDTC were included into the study. Foramen nasalis diameter (P1), foramen incisivum diameter (P2), NPC length (P3), distance between buccal wall of incisive foramen and facial side of the buccal bone (P4), distances between buccal bone wall of NPC and facial side of buccal bone (P5), distance between mid-NPC buccal wall and facial side of buccal bone (P6), distance between buccal wall of NPC and the apex of anterior central incisors (P7) and NPC angle (P8) were measured. Formal variations in NPC were searched for. Differences in morphometric data were searched using Student t-test or Mann-Whitney test. Gender-based analysis of the variations was done with the χ2 test. Pearson's test was used to search for correlation between morphometric data and age. RESULTS P1 was larger in men (3.72±1.41mm) than in women (3.07±1.34mm) (P<0.001). Similarly, P3 was larger in men (13.68±2.73mm) than in women (11.43±2.78mm) (P<0.001). No differences in the other NPC measurements (P2, P4, P5, P6, P7, P8) were found between men and women. Morphological variations in NPC (cylindrical, hourglass, banana shape, funnel shape, single canal, Y-type canal, parallel canal and others) were detected with frequencies ranging from 8 to 65.3%. A significant negative correlation was found between NCP measurements and patient age for P3 (r=-0.311; P=0.002), P4 (r=-0.267; P=0.007) and P8 (r=-0.318; P<0.001). New NPC variations, which were not reported before were found in 19% of our patients. CONCLUSION NPC shows myriad potential variations that have various prevalences. It is assumed that familiarity with these variations may help decrease the incidence of complications during facial or dental surgery.
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Affiliation(s)
- Y Gönül
- Department of anatomy, faculty of medicine, Afyon Kocatepe University, 03200 Afyonkarahisar, Turkey.
| | - A Bucak
- Department of otolaryngology, faculty of medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Y Atalay
- Department of oral and maxillofacial surgery, faculty of dentistry, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - M Beker-Acay
- Department of radiology, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - A Çalişkan
- Faculty of medicine 3rd term students, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - G Sakarya
- Faculty of medicine 3rd term students, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - N Soysal
- Faculty of medicine 3rd term students, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - M Cimbar
- Faculty of medicine 3rd term students, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - M Özbek
- Faculty of medicine 3rd term students, Afyon Kocatepe University, Afyonkarahisar, Turkey
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